| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.16 | 32 |
| 2015 | 15.89 | 31 |
| 2014 | 15.79 | 30 |
| 2013 | 15.73 | 29 |
| 2012 | 15.7 | 27 |
| 2011 | 15.69 | 27 |
| 2010 | 15.71 | 23 |
| 2009 | 15.78 | 22 |
| 2008 | 15.91 | 22 |
| 2007 | 16.03 | 19 |
| 2006 | 16.05 | 18 |
| 2005 | 15.89 | 18 |
| 2004 | 15.7 | 17 |
| 2003 | 15.29 | 19 |
| 2002 | 14.74 | 22 |
| 2001 | 14.21 | 24 |
| 2000 | 13.8 | 25 |
| 1999 | 13.64 | 25 |
| 1998 | 13.63 | 24 |
| 1997 | 13.7 | 23 |
| 1996 | 13.7 | 23 |
| 1995 | 13.53 | 23 |
| 1994 | 13.39 | 21 |
| 1993 | 13.11 | 20 |
| 1992 | 12.72 | 22 |
| 1991 | 12.33 | 22 |
| 1990 | 11.99 | 22 |
| 1989 | 11.71 | 23 |
| 1988 | 11.48 | 23 |
| 1987 | 11.33 | 24 |
| 1986 | 11.23 | 24 |